The Des Moines Airport Advisory Committee met on April 13, 2026, and is scheduled to meet again on May 11, 2026, to discuss issues related to Seattle-Tacoma International Airport's impact on the Des Moines, Washington community. Key agenda topics include updates on the Sustainable Airport Master Plan (SAMP) and its Draft Environmental Impact Statement, as well as a proposed workplan amendment covering noise and traffic mitigation measures, public education efforts, and a community survey. The committee also seeks a more comprehensive traffic analysis that accounts for impacts from the completed WSDOT Highway 509 project.

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Agenda for Des Moines Airport Advisory Committee meeting including approval of April 13, 2026 minutes, complaints/communications, Sea-Tac Stakeholder Advisory Round Table update, Sustainable Airport Master Plan update, and workplan amendment discussion covering SAMP Draft EIS response and community education efforts.

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As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.

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